Answer:
Option B is correct.
u= x+4
Step-by-step explanation:
Solve the equation:
Using substitution:
Let u = x+4
then;
....[1]
For a quadratic equation ....[2], then the solution is given by:
On comparing equation [1] and [2] we have;
a = 1 , b = -3 and c = -3
then;
⇒
⇒
Substitute u = x+4
then;
⇒
Subtract 4 from both sides we have;
⇒
and
⇒
Therefore, the solution for the given equation are,
,